IMPLEMENTATIONS COMPLETED

BB-7000/AC-14m/s skip hoisting machine

BB-7000/AC-14m/s skip hoisting machine is designed for double-conveyance haulage mining hoists. It is a double-drum hoisting machine with the capability of mutual exchange of winding drums. It is applied in a double-conveyance mine shaft hoist without a balancing rope.

Scope of the project

installation of the hoisting machine,
installation of the shaft signalling and communication system,
development of technical documentation for the entire scope of the task,
production and delivery of hoisting machine components and the shaft signalling and communication system,
supervision of the hoisting machine installation,
execution of procedures related to the approval of equipment for use in mining operations,
commissioning of the delivered equipment.

BB-7000/AC-14m/s skip hoisting machine

The BB-7000/AC-14m/s skip hoisting machine (designated for eastern markets: 2Ц-7.0×3.2) is designed for double-conveyance haulage mining hoists. It is a double-drum hoisting machine with the capability of mutual exchange of winding drums. It is applied in a double-conveyance mine shaft hoist without a balancing rope.

The BB-7000/AC-14m/s machine is operated manually from the control station or automatically – including in remote start mode with speed regulation.

The main components of the hoisting machine are:

a drive motor with a power output of 4500 kW and a rotational speed of 38.0 rpm.
main drum shaft with bearings,
gear coupling,
two winding drums with decoupling functionality,
hoist brake,
lubrication unit,
inverter transformers,
frequency converter
excitation converter,
control and safety systems for the hoisting machine,
digital drive controller and speed control system,
visualisation system,
auxiliary equipment.

Hoisting Machine Characteristics

Machine designation: BB-7000/AC-14m/s
Machine location: shaft entry
Scope of use: driving equipment for double-conveyance haulage mining hoists
Types of control:
- manual control
- automatic in remote start mode with speed control
- automatic control
Operation modes:
- haulage
- non-haulage transport
- personnel transport
- personal transport
- shaft inspection
- shaft maintenance
Travel speeds: controllable, up to 14 m/s
Acceleration: 0.8 m/s²
Deceleration: 1.0 m/s²
Power supply: 10 kV
Drive: synchronous motor
Motor bearing: slide bearing, recirculating lubrication, with hydrostatic shaft lift
Motor manufacturer: SIEMENS
Rated motor specifications:
- Designation: 1DM6040-6DT10-Z,
- Power: P_n = 4.5 MW,
- Rated current: I_n = 876 A,
- Rated voltage: U_n = 3150 V,
- Speed: n_n = 38 obr/min,
Coupling: Siemens ZAPEX ZWN 1160 gear coupling
Nominal drum diameter: Ø7000
Width of the winding area of the drum: 3200 mm
Main shaft bearings: slide bearing, recirculating lubrication, with hydrostatic shaft lift
Lubrication unit: LS produced by MWM Elektro Sp. z o.o.
Brake:
- Disc-type with hydraulic opening cylinders
- Two brake discs
- Brake cylinders BSFG 408-A00-02-00S, manufactured by SVENDBORG BRAKES A/S
- 4 brake columns, each housing 5 pairs of cylinders
Electrohydraulic control and power unit: H-C MWM-4/VER.III (a system consisting of two brake units, LA and LB, and the LP-4 switch)
Loose drum decoupling system: ZWB
Maximum static force in the wire rope: 580 kN
Maximum torque on machine shaft: 1125 kNm
Maximum lifting rope breaking force: 4200 kN
Maximum pressure exerted on the drum shell by the rope: 2.5 MPa